Home / 21,421.56-29,561.73-11,990.13

Finding the Fourth Proportional to 21,421.56, 29,561.73 and 11,990.13

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Solution

The fourth proportional to 21,421.56, 29,561.73 and 11,990.13 is: 16,546.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,421.56 : 29,561.73 = 11,990.13 : x
  2. Step 2: Convert to fraction form
    21,421.56/29,561.73 = 11,990.13/x
  3. Step 3: Cross multiply
    21,421.56x = 29,561.73 × 11,990.13
  4. Step 4: Simplify right side
    21,421.56x = 354,448,867.89
  5. Step 5: Solve for x
    x = 354,448,867.89/21,421.56
  6. Step 6: Final answer
    x = 16,546.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.